how can i create a password protected rar achieve?
Files with the .rar filename extension are archives created with the help of the RAR and WinRAR archival and compression tools developed by Eugene Roshal. He first released them for the MS-DOS operating system. RAR became a hit among users who valued its wide range of features and high compression ratios, as well as its friendly user interface, which was similar to Norton Commander’s (or Midnight Commander’s).
Since RAR for Linux is a full port of the software, you can enjoy all of the benefits of original RAR (except the MC-style interface). Remember, though, that RAR for Linux is not free; you must register it with T:mi Softronic, which is based in Finland.
The list of RAR for Linux options is impressive and could be used as a to-do list by developers of other archival and compression tools. To compress a single file, type rar a archive file. The .rar extension will automatically append to the archive (and its full filename will be archive.rar). If archive.rar already exists in the present working directory, then the file you are trying to add to archive.rar will be simply added to the existing archive. Only when archive.rar already contains a file with the same name will the old file be replaced with the new one. Other files stored inside the archive will be unaffected. Keep in mind that this action is blind, meaning that RAR does not check the time stamps of files; that check is only done if you add the -u option after a. Note the missing minus sign (-) before a (e.g., rar a -u archive file).
The archiving of multiple files is very easy: to archive all files and directories in the present working directory, type rar a archive. To archive the contents of a particular directory, type rar a archive /path/to/directory. To archive groups of files, enclose them in quotes, like this: rar a archive ‘*.cpp’.
File replacement rules and the -u option work for multiple files in the same way that they work for a single file. Wildcards use the same syntax that they usually do in your favorite shell, but you must remember to quote them.
Here are some additional RAR options:
l – lists the contents of the archive (e.g., rar l archive.rar)
v – lists the contents of the archive in a verbose format (e.g., rar v archive.rar)
t – tests the archive’s integrity (e.g., rar t archive.rar)
Note that not all RAR options start with a minus sign (-); for details, run RAR without any options and arguments (e.g., rar/rar, if the RAR directory is located in the present working directory). See the RAR manual file (it’s the rar.txt file, also located in the RAR directory) for more details.
With RAR, you can decompress whole archives (use rar e archive.rar), a single file (use rar e archive.rar file, or groups of files (use rar e archive.rar ‘.cpp’). Since RAR can work with multiple files, you can also extract groups of files from more than one archive using rar e '.rar’ ‘*.cpp’.
When RAR cannot extract a file from an archive, use the repair option to rescue it: rar r archive.rar.
You can get RAR for Linux from the official RAR site as a self-extracting archive. You will need to run it with the ./rarlnx271.sfx command (the number at the end may differ as new versions of RAR are released). The archive will unpack its contents into the automatically created rar subdirectory of the present working directory. There you will find the rar binary. You may move rar binary to the /sbin or /usr/sbin directory to make it available to all users. Apart from RAR itself, you can also get UnRAR, a small utility to decompress .rar files, which is handy if you want to give other users the option to open such archives but not to create them.
RAR site: http://www.rarsoft.com
++Hope this helped a-Little++ ??? ???
I use 7-zip which supports .rar file types , and of course .zip . There’s a checkbox option when compressing to “Password protect” the created Archive. I dont know what program your using , but I’m pretty sure most do so.
I use 7-zip or, most often, IZArc 8)
Both will give you password features for the archive files.
i’m using winrar trial version and now i installed 7-zip and i solved the problem…thnx a lot guys…u helped me a lot… 
I prefer 7zip to winrar as it doesn’t try to take over your context menu with multiple different entries. I also feel 7zips interface is easier to work with. Not to mention it is free ;D
Change your settings in WinRAR and this doesn’t happen: 
http://img.photobucket.com/albums/v190/bob3160/ShellFTP/WinRAR.png
Thanks Bob, I couldn’t find that when I trialled it some time ago. Stayed with the free 7zip though.